Why was a medical helicopter already en route to Uvalde before the shooting to pick up kids that haven't been shot yet? It departed for Uvalde at 11:10am CDT and landed 5 minutes down the road from Robb Elementary

The shooting did not begin until 11:30am CDT.

The first 911 call related to either the grandmother or school shooting was not until at least 11:20am or 11:30am according to multiple reports.